NAME

       mPutHdr - Replace a FITS image's header with one from an ASCII header template

SYNOPSIS

       mPutHdr [-d level] [-s statusfile] [-h hdu] in.fits out.fits hdr.template

DESCRIPTION

       Replaces the header of the input file with one supplied by the user.

OPTIONS

       -d     Turns on debugging to the specified level (this version only supports level "1").

       -s statusfile
              Output and errors are sent to statusfile instead of to stdout

       -h hdu Write to the specified FITS extnension (HDU).

ARGUMENTS

       in.fits
              Input FITS file.

       out.fits
              Path to output FITS file (with new header)

       hdr.template
              ASCII header template to write into out.fits.

RESULT

       [struct stat="OK"]

       Creates  FITS file out.fits which contains the same data as in.fits, but has the contents of template.hdr
       as its header in the specified extension (default 0, or primary extension).  numlines is  the  number  of
       FITS header lines found in the input header template.

MESSAGES

       OK     [struct stat="OK"]

       ERROR  Cannot open status file: statusfile

       ERROR  HDU value (hdu) must be a non-negative integer

       ERROR  Not enough memory for output data image array.

       ERROR  Input wcsinit() failed.

       ERROR  FITS library error

EXAMPLES

       After  running  mGetHdr  to  write the contents of a FITS header to a file, we can edit that file to make
       corrections (remove extraneous lines, add HISTORY lines, etc).  Then, to write  a  file  with  the  fixed
       header:

       $ mPutHdr acs.fits acs_out.fits acs_fixed.hdr
              [struct stat="OK"]

BUGS

       The drizzle algorithm has been implemented but has not been tested in this release.

       If a header template contains carriage returns (i.e., created/modified on a Windows machine), the cfitsio
       library will be unable to read it properly, resulting in the  error:  [struct  stat="ERROR",  status=207,
       msg="illegal character in keyword"]

       It  is  best  for  the  background  correction  algorithms  if  the area described in the header template
       completely encloses all of the input images in their entirety. If parts of input images are "chopped off"
       by  the  header  template,  the  background correction will be affected. We recommend you use an expanded
       header for the reprojection and background modeling steps, returning to  the  originally  desired  header
       size  for  the  final  coaddition.  The  default background matching assumes that there are no non-linear
       background variations in the individual images (and therefore in the overlap differences).  If  there  is
       any  uncertainty  in  this  regard, it is safer to turn on the "level only" background matching (the "-l"
       flag in mBgModel.

COPYRIGHT

       2001-2015 California Institute of Technology, Pasadena, California

       If your research uses Montage, please include the following acknowledgement: "This research made  use  of
       Montage.  It  is  funded  by  the  National  Science  Foundation  under Grant Number ACI-1440620, and was
       previously funded by the National Aeronautics and Space Administration's Earth Science Technology Office,
       Computation  Technologies  Project,  under  Cooperative  Agreement  Number  NCC5-626 between NASA and the
       California Institute of Technology."

       The Montage distribution includes an adaptation of the MOPEX algorithm developed at the  Spitzer  Science
       Center.